hog-tied for 12 hours. can you show me? >> well, they take belly chains and put them around here, around your waist, take leg irons and put them around both and have you kneel on something like the bench of your bed and connect a chain between the back of here this ways. and down to here. so you're stuck to where you can't stand up straight. you have to walk around on your knees within your cell, so you can't stand up at all, couldn't use the bathroom and the toilet, that's where you're stuck. >> reporter: that's got to be very painful. >> it's the worst thing i ever went through. >> reporter: solitary is a place of punishment, where they put the most violent prisoners. ironically, it's also a place of security for the most vulnerable, informers, ex-cops, kids. first impression? especially on a day like this when you got the sunlight streaming in through the window, not that bad, you got a bunk, a desk, a toilet, wash basin, but it's three steps across the cell, six steps the length of it.